/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org

This file is part of Gephi.

DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

Copyright 2011 Gephi Consortium. All rights reserved.

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or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
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 */
package org.gephi.io.processor.spi;

import javax.swing.JPanel;
import org.gephi.io.importer.api.Container;

/**
 * Define processor settings user interface.
 * <p>
 * Declared in the system as services (i.e. singleton), the role of UI classes
 * is to provide user interface to configure processors and remember last used
 * settings if needed. User interface for processors are shown when the import
 * report is closed and can access the container before the process started.
 * <p>
 * To be recognized by the system, implementations must just add the following
 * annotation:
 * <pre>@ServiceProvider(service=ProcessorUI.class)</pre>
 *
 * @author Mathieu Bastian
 * @see Processor
 */
public interface ProcessorUI {

    /**
     * Link the UI to the processor and therefore to settings values. This
     * method is called after <code>getPanel()</code> to push settings.
     *
     * @param processor the processor that settings is to be set
     */
    public void setup(Processor processor);

    /**
     * Returns the processor settings panel.
     *
     * @return a settings panel, or <code>null</code>
     */
    public JPanel getPanel();

    /**
     * Notify UI the settings panel has been closed and that new values can be
     * written.
     */
    public void unsetup();

    /**
     * Returns <code>true</code> if this UI belongs to the given processor.
     *
     * @param processor the processor that has to be tested
     * @return <code>true</code> if the UI is matching with
     * <code>processor</code>, <code>false</code> otherwise.
     */
    public boolean isUIFoProcessor(Processor processor);

    /**
     * Returns <code>true</code> if the processor this UI represents is valid
     * for <code>containers</code>. Processors could be specific to some type of
     * data and this method can provide this information.
     *
     * @param containers containers that are to be processed
     * @return <code>true</code> if the processor this UI represents is valid
     * for <code>containers</code>.
     */
    public boolean isValid(Container[] containers);
}
